Robust finite-time controller for damping of subsynchronous resonance in doubly fed induction generator wind farm. (January 2021)

• Record Type: Journal Article
• Authors: Li, Penghan; Wang, Jie; Xiong, Linyun; Ma, Meiling; Khan, Muhammad W; Huang, Sunhua
• Is Part Of: Journal of vibration and control. Volume 27:Number 1/2(2021)
• Page Start: 129
• Page End: 139
• Publication Date: 2021-01
• Subjects: Doubly fed induction generator -- finite-time control -- subsynchronous resonance; Vibration -- Periodicals; Damping (Mechanics) -- Periodicals; 620.3
• DOI: 10.1177/1077546320924490
• Languages: English
• ISSNs: 1077-5463

Abstract

To alleviate subsynchronous resonance in doubly fed induction generator–based wind farm, this study devises a robust nonlinear control for a rotor-side converter based on a fractional-order sliding mode controller. The designed fractional-order sliding mode controller is able to realize finite-time control and reduce the control time compared with terminal sliding mode control, which contributes to the faster mitigation of subsynchronous resonance. Impedance-based analysis and transient simulation are carried out to evaluate the performance of the fractional-order sliding mode controller compared with terminal sliding mode control and subsynchronous damping control. Simulation results verify that the fractional-order sliding mode controller is able to damp SSR within shorter time and effectively reduce the fluctuation range of a system's transient responses under various working conditions of compensation degrees and wind speeds. Furthermore, the fractional-order sliding mode controller enhances the robustness under external disturbance and parametric uncertainty, ensuring safe operation of the practical wind farm.